This is a WIP (work in progress) rom by r2DoesInc on XDA. It currently does not support data and not everything works.  I installed it on my phone so you wouldn’t have to.  Check out what the HTC Doubleshot, aka Mytouch 4G Slide, will look like.  It has Android 2.3.3 and Sense 3.0 which features the new lock screen and 3D carousel launcher.  The port is based of the HTC Doubleshot ROM that was leaked on 911Sniper.